Near-Field Thermometry Sensor Based on the Thermal Resonance of a Microcantilever in Aqueous Medium

A new concept using a near-field thermometry sensor is presented, employing atipless microcantilever experimentally validated for an aqueous medium within approximatelyone cantilever width from the solid interface. By correlating the thermal Brownian vibratingmotion of the microcantilever with the s...

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Main Authors: Kenneth David Kihm, Kyung Chun Kim, Seonghwan Kim
Format: Article
Language:English
Published: MDPI AG 2007-12-01
Series:Sensors
Subjects:
Online Access:http://www.mdpi.com/1424-8220/7/12/3156/
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spelling doaj-9b80a668a7664a2992e530b068ddde182020-11-25T01:00:41ZengMDPI AGSensors1424-82202007-12-017123156316510.3390/s7123156Near-Field Thermometry Sensor Based on the Thermal Resonance of a Microcantilever in Aqueous MediumKenneth David KihmKyung Chun KimSeonghwan KimA new concept using a near-field thermometry sensor is presented, employing atipless microcantilever experimentally validated for an aqueous medium within approximatelyone cantilever width from the solid interface. By correlating the thermal Brownian vibratingmotion of the microcantilever with the surrounding liquid temperature, the near-fieldmicroscale temperature distributions at the probing site are determined at separation distancesof z = 5, 10, 20, and 40 μm while the microheater temperature is maintained at 50°C, 70°C, or90°C. In addition, the near-field correction of the correlation is discussed to account for thequenched cantilever vibration frequencies, which are quenched due to the no-slip solid-wallinterference. Higher thermal sensitivity and spatial resolution is expected when the vibrationfrequencies increase with a relatively short and thick cantilever and the dimensions of themicrocantilever are reduced. Use of the microcantilever thermometry sensor can also reduce thecomplexity and mitigate the high cost associated with existing microfabricated thermocouplesor thermoresistive sensors.http://www.mdpi.com/1424-8220/7/12/3156/microcantileverresonancenear-fieldthermometry.
collection DOAJ
language English
format Article
sources DOAJ
author Kenneth David Kihm
Kyung Chun Kim
Seonghwan Kim
spellingShingle Kenneth David Kihm
Kyung Chun Kim
Seonghwan Kim
Near-Field Thermometry Sensor Based on the Thermal Resonance of a Microcantilever in Aqueous Medium
Sensors
microcantilever
resonance
near-field
thermometry.
author_facet Kenneth David Kihm
Kyung Chun Kim
Seonghwan Kim
author_sort Kenneth David Kihm
title Near-Field Thermometry Sensor Based on the Thermal Resonance of a Microcantilever in Aqueous Medium
title_short Near-Field Thermometry Sensor Based on the Thermal Resonance of a Microcantilever in Aqueous Medium
title_full Near-Field Thermometry Sensor Based on the Thermal Resonance of a Microcantilever in Aqueous Medium
title_fullStr Near-Field Thermometry Sensor Based on the Thermal Resonance of a Microcantilever in Aqueous Medium
title_full_unstemmed Near-Field Thermometry Sensor Based on the Thermal Resonance of a Microcantilever in Aqueous Medium
title_sort near-field thermometry sensor based on the thermal resonance of a microcantilever in aqueous medium
publisher MDPI AG
series Sensors
issn 1424-8220
publishDate 2007-12-01
description A new concept using a near-field thermometry sensor is presented, employing atipless microcantilever experimentally validated for an aqueous medium within approximatelyone cantilever width from the solid interface. By correlating the thermal Brownian vibratingmotion of the microcantilever with the surrounding liquid temperature, the near-fieldmicroscale temperature distributions at the probing site are determined at separation distancesof z = 5, 10, 20, and 40 μm while the microheater temperature is maintained at 50°C, 70°C, or90°C. In addition, the near-field correction of the correlation is discussed to account for thequenched cantilever vibration frequencies, which are quenched due to the no-slip solid-wallinterference. Higher thermal sensitivity and spatial resolution is expected when the vibrationfrequencies increase with a relatively short and thick cantilever and the dimensions of themicrocantilever are reduced. Use of the microcantilever thermometry sensor can also reduce thecomplexity and mitigate the high cost associated with existing microfabricated thermocouplesor thermoresistive sensors.
topic microcantilever
resonance
near-field
thermometry.
url http://www.mdpi.com/1424-8220/7/12/3156/
work_keys_str_mv AT kennethdavidkihm nearfieldthermometrysensorbasedonthethermalresonanceofamicrocantileverinaqueousmedium
AT kyungchunkim nearfieldthermometrysensorbasedonthethermalresonanceofamicrocantileverinaqueousmedium
AT seonghwankim nearfieldthermometrysensorbasedonthethermalresonanceofamicrocantileverinaqueousmedium
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